Home / 3,821.20-5,266.08-2,640.16

Finding the Fourth Proportional to 3,821.20, 5,266.08 and 2,640.16

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Solution

The fourth proportional to 3,821.20, 5,266.08 and 2,640.16 is: 3,638.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.20 : 5,266.08 = 2,640.16 : x
  2. Step 2: Convert to fraction form
    3,821.20/5,266.08 = 2,640.16/x
  3. Step 3: Cross multiply
    3,821.20x = 5,266.08 × 2,640.16
  4. Step 4: Simplify right side
    3,821.20x = 13,903,293.77
  5. Step 5: Solve for x
    x = 13,903,293.77/3,821.20
  6. Step 6: Final answer
    x = 3,638.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.